Pneumatic riveting apparatus.



Patented Dec. 25, I900. J. J. TYNAN G. MOSTILLER.

PNEUMATIC RIV ETING APPARATUS.

(Application filed Now- 6, 1899.)

2 Sheets-Sheet (No Model.)

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Patented Doc. 25, I900. J. J.'TYNAN,&.- H. 0. MOSTILLEB'. PNEUMATICRIVETING APPARATUS.

(Application filed Nov. 0, 1899.)

2 Sheets-Sheet n Model.)

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UNITED STATES P TENT OFFICE.

JOSEPH J. TYNAN AND HENRY O. MOS'IILLER, OF PHILADELPHIA, PENE-SYLVANIA, ASSIGNORS, BY MESNE ASSIGNMENTS, TO THE PNEUMATIC TOOLIMPROVEMENT COMPANY, OF SAME PLACE AND CAMDEN, NEW JERSEY.

PNEUMATIC RIVETING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 6644596, dated December25, 1966. Application filed November 6, 1899. Serial No. 786,899. \Nomodel.)

To all whom it may concern: l extension or protrusion of the hammer car-50 Be it known that we, JOSEPH J. TYNAN and rier, said two movementstaking place prac- HENRY C. MOSTILLEB, citizens of the United ticallycontemporaneously. States,residingin the cityand county of Phila- Inapparatus of this character, especially delphia, in the State ofPennsylvania, have of large siz e, difficulty has been encountered,

invented certain new and useful Improvein the rapid movement of themachine from 55 ments in Pneumatic Riveting Apparatus, of one rivet toanother, in so setting the appawhich the following is a specification.ratus that when the hammer carrier carries Our improvements relate to awell known the rivet tool against the rivet said tool will,

class of pneumatically operated riveting n1aunder the actuation of thehammer, strike the chines, in which, in the tubularbore ofamain rivetfairly on its end, the frequent result 60 casing,is mounted freeforlongitudinal movehaving been that when the hammer carrier menta'protruding tubular hammer carrier has risen to the limitof its strokethe rivet embodying a hammer race, in which in turn tool has beatenagainst the metal in the viis mounted for very rapid reciprocation acinity of the rivet, and, its strokes being made hammer which initsmovement acts against very rapidly, effected a very considerable bat-65 a rivet tool which, in the operation of riveting, tering of saidmetal before the operator could encounters and upsets the metal of arivet or adjust the main casing on its bearings to other body. cause therivet tool to strike the rivet alone.

The presence of the protrudinghammercar- It is the object of ourinvention to provide rier dispenses with the necessity for carrying apneumatically operated riveting machine 70 the main casing of themachineinto close proxof the general class indicated, in which the imitywith the metal to be operated upon, and, hammer carrier on the one hand,and the hamtherefore, of removing it from proximity to mer on the other,shall be subject to indesaid metal each time one rivet tool is to bependent control.

replaced by another; dispenses with the ne- When these two elements areindepend- 75 cessity of carrying the main casing of the maentlycontrolled the rivet tool may be caused chine forward as the rivetoperated upon is to strike the rivet fair and the consequent batbeatendown, to maintain the rivet tool in potering of the surface adjacentthereto be sition to operate against the rivet; and enavoided.

ables, furthermore, the employment of the In ourimproved construction,the hammer 8o apparatus to upset rivets in spaces between carrier withthe hammer and rivet tool at rest projecting girders and in otherrestricted within it, may be caused to protrude to the areas in whichthe main frame of the machine limit of its movement, in which positionthe could not be entered, and in which, therefore, rivet tool will bebrought within a very mibut for the additional range of movement afnutedistance of the rivet to be operated upon; forded by the hammer carrier,the apparatus it can then be instantly seen by the operator could not beemployed. whether or not the rivet tool is in position to In apparatusof this class as heretofore constrike a fair blow, so that, if not, themachine 0 structed, the hammer has been mounted in can be adjusted tobring it into such posithe tubular interior of the hammer carrier, tion.After this has been done the hammer and by virtue of suitable air spacesand ports can be thrown into operation to, through the and portcontrolling devices, with which the rivet tool, upset'the end of therivet andsuch hammer carrier has been provided, the comupsetting will beaccomplished without any 45 pressed air entering through the lower orrear uncertainty or unnecessary battering of the end of the main casingand through the open adjacent metal plates. lower or rear end of thehammer carrier, has, In the preferred embodiment of our invenwhen turnedon, operated to occasion the very tion illustrated in the accompanyingdrawrapid reciprocation of the hammer and the ings and herein described,we set forth the nection with independent air passages, one of whichafiords access for air to efieet the reciprocation of the hammer and theother of which affords access for air to efiect the protrnsion of thehammer carrier, both of said air passages, however, being preferablycontrolled by a single controlling valve plug,

' In the accompanying drawings we show, and herein we describe, a goodform of a convenient embodiment of our invention, the particularsubject-matter claimed as novel being hereinafter definitely specified.

In the accompanying drawings,

Figure 1 is a view, partly in central section and parlly in elevation,of an apparatus embodying a preferred form of our improvements, theportion of the main casing nearest the eye being supposed removed toexhibit the interior construction.

Figure 2 is a central longitudinal section of the lower end of the maincasing, the controlling valve plug being shown in elevation, said plugbeing illustrated as in the position it occupies when the machine is atrest.

Figure 3 is a sectional elevation on the line 33 of Figure 2, with theparts in the position shown in said Figure 2.

Figure i is a view similar to Figure 2, illustrating the valve plug,however, in the position it occupies in giving the lead to the airthrough the carrier air inlet.

Figure 5 is a sectional elevation on the line "5-5 of Figure 4, theparts being in the same position illustrated in said Figure 4.

Figure 6 is a View in side elevation, illustrating the exterior of thelower portion of the main casing, the position of the control- V lingvalve plug and inlets being illustrated in dotted lines, said plug beingshown in this figure, as also in Figure l, as set in position I itoccupies when the air is being conducted to the hammer.

Figure? is a view in side elevation of the parts shown in Figure 6,sight being taken toward the lower face of the parts as shown in Figure6.

Similar letters of reference indicate corresponding parts.

In the drawings,

A indicates themain casing or frame, being a tubular cylindricalstructure embodying What we term the carrier chamber A and the guidechamber a, which last named chamber is in the form shown an axialcontinuation of the carrier chamber proper.

The carrier chamber and guide chamber areconvenientlyofcircularsection.The upper end of the carrier chamber is closed by a web B which embodiesan axial aperture within which the hammer carrier snugly fits.

C are arms or trunnions extending out from the main casing, which are tobe entered in suitable bearings in any convenient yoke or frame, for thesupport of the apparatus.

The lower end of the casing is closed by a web or block D, penetrated,however, by two hammer air inlets, as we term them, 6, and a carrier airinlet, as we term it, f, all three of which inlets are intersected by a.transversely extending valve seat in which is mounted a v valve plug Gwhich controls them.

The hammer air inlets e open into the rear or lower end of the guidechamber, and the carrier air inlet extends up through the wall of theguide chamber and opens through the rear end of'the carrier'chamberproper.

The outer ends of the hammer air inlets and carrier air inlet open intoa threaded recess H in which may be engaged a threaded thimble or ringat the extremity of an air pressure supply pipe, not shown[ The hammercarrier consists in the form shown of a cylindrical bodyj disposedwithin the carrier chamber but protruding through an opening in the endplate or web B thereof, said carrier having the head J and an opentubular extension J .which projects within the guide chamber.

The open lower or rearend of the carrier within the guide chamber isshown as provided with a cup leather packing orwasher 't' mount ed uponits lip, and secured in position in any convenient and usual manner. Thewasher precludes the entrance of the air which enters through the inlets6, between the wall of the carrier and the wall of the guide chamber. 7

Within the hollow interior of the carrier is mounted the hammer K,hereinbefore referred to, which, under air pressure admitted through thehammer air inlets 'e, and into the body of the hammer carrier throughthe rear end of saidcarrier (the opening through said rear end throughwhich the air has access to the operative parts being indicated indotted line in Figure 1) will be caused to reciprocate within itsrace-way in said carrier.

L is a rivet tool of anyselected form mounted in the open upper end ofthe carrier, and adapted to be encountered by the hammer in thereciprocation of the latter, through which tool the impactof the hammeris transmitted to the rivet or other device operated upon.

The form of the hammer, the arrangement of the hammer race, the form anddisposition of the valve passages, valves, and mechanism by'which theair entering through the hammer air inlet and into the carrier occasionsthe operation of the hammer, form in themselves no part of ourimprovements and are, therefore, not herein illustrated and described,and any such known mechanism suitable for the purpose may, of course, beemployed.

the head of the carrier may be considered as a piston head, so to speak,within the lower or outer portion of the carrier chamber proper, that isto say, the side walls of the lower portion of the carrier chamberproper are im perforate, and the lower portion of the carrier head iseither very accurately fitted within said chamber, or, as is preferable,and as is illustrated in Figure l, is provided with a packing ring, J,so that a tight closure is effected between the lower portion of saidcarrier head and the wall of the lower portion of said chamber, with theresult that air under pressure entering the rear or lower end of saidchamber expands between the rear wall or end of the chamber and theunder face of the carrier head, and forces said carrier upward or towardthe right in Figure 1, until the front end of the carrier head makescontact with the front end of the carrier chamber, unless, of course,the rivet tool encounters the rivet to be acted on before the carrierhas so far progressed.

The rear extension J of the carrier entered in the guide chamber, isconveniently provided with an enlarged belt or packing j which snuglyfits within said chamber and thus prevents the air, which enters throughthe carrier inlet port, from backing down through said guide chamber.

In the operation of our apparatus, therefore, before setting the hammerin motion, we afford access to the compressed air through the carrierinlet port, which air, operating against the carrier as described,occasions its forward or outward movement until it reaches the limit ofits travel wherever that may be, the hammer and the rivet tool beingalso carried outward but remaining without independent movement for thetime being.

After the hammer carrier has been thus forced outward, and the machineadjusted with reference to the rivet if necessary, we give the lead tothe air through the hammer air inlet or inlets e, and thereupon saidair, passing through the guide chamber and up through the extension Jinto the interior of the carrier occasions the reciprocation of thehammer in the usual manner.

When the contemplated operation has been completed we give the lead tothe air in the space behind the carrier to the atmosphere.

Thereupon the carrier, when the apparatus is held with its rivet toolupward, as is very usual in performing riveting work on the bulls ofvessels, will descend by gravity to its normal position in the lowerpart of the casin g.

To accomplish this control of the air inlets we prefer to resort to thearrangement illustrated The outer ends of the hammer air inlets andcarrier air inlet, which exist in a common plane, are in communicationwith a constant source of pressure, while the seat for the valve plug G,as described, intersects all the said inlets.

The valve plug G referred to is a cylindrical body,snugly fitted andsecured in place within said seat, and provided with an operating handleG.

Said valve plug is provided with two hammer air inlet ports or channelsN N which in one position of the plug, to-wit, the position indicated inFigures 1 and 6, are in registry with and give the lead to the airthrough the hammer air inlets.

Said valve plug also embodies a carrier air inlet port or channel Mwhich in a certain position of the plug, to-wit, the position shown inFigures 4 and 5, is in registry with and gives the lead to the airthrough the carrier air inlet.

Said valve plug is also provided with an exhaust port 0 which in acertain position of the parts, to-wit, the position illustrated inFigures 2 and 3, connects the inner branch of the carrier air inlet withan outlet passage P shown in Figure 3, to give the lead to the air fromthe region back of the carrier to the atmosphere.

The ports or channels M N O occupy such relationship with respect toeach other, that when the parts are in the position illustrated inFigures 2 and 3, that being their normal position, the machine is out ofoperation.

When the handle G is moved in the appropriate direction, namely, to theright, the port M will be brought into registry with the carrierairinlet as shown in Figures 4 and 5, and air will enter the region inthe carrier chamber back of the carrier head and cause the outwardmovement of the carrier as desired.

After the carrier has thus moved outward, and the machine has been givenany further adjustment which maybe necessary to make a fair stroke uponthe rivet, the handle is still further moved to the right, and,thereupon, the port M is carried out of registry with the carrier airinlet and the ports N carried into registry with the hammerair inlets,whereupon the air entering through the hammer inlets will occasion thereciprocation of the hammer in the usual manner.

After the hammer has reciprocated for the required period the handle ismoved to the left, shutting oif air through the hammer air inlet,carrying the port M past but not stopping in registry with the carrierair inlet, and, in the continued movement of the handle, carrying theexhaust port 0 into registry with the inner branch of the carrier airinlet passage and the outlet passage P, and coming to rest in suchposition, to allow theescape of the air from behind the carrier head.

It will be understood that in the described operation, after the air hasentered through the carrier airinlet to occasion the protrusion of thecarrier, and is then cut off, said carrier will be maintained in itsprotruded position by the air within the carrier chamber behind the headof the carrier, and by the force of the air entering through the hammerair inlets and operating against the hammer,

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ber, opening as to its inner end within the carrier chamber and as toits outer end in communication with a source of compressed air, a valveseat which intersect-s said hammer air inlet and said carrier air inlet,an exhaust passage which leads from said valve seat to the atmosphere, avalve plug mounted for rotation in said seat, and embodying a hammer airinlet port, an independent carrier air inlet port and an independentexhaust air port, substantially as set forth.

9. In a riveting machine or similar device, a main casing embodying acarrier chamber and a guide chamber in communication with each other, acarrier comprising a tubular body having an enlarged head and an axialextension, said carrier being mounted in said carrier chamber with itsextension projecting into and snugly fitting within the guide chamber,and its upper end protruding from the casing, a hammer mounted forreciprocation in and carried by said carrier, a hammer air inlet portpassing through the normally closed lower end of the guide chamber, acarrier air inlet port or passage extending from end to end of the wallof the guide chamber, and opening at its inner end within the carrierchamber, and means for controlling said inlet passages, substantially asset forth.

10. In a riveting machine or similar device, a main casing embodying acarrier chamber and aguide chamber in communication with each other, acarrier comprising a tubular body having an enlarged head and an axialextension, said carrier being mounted in said chamber, with itsextension projecting into the guide chamber and its upper end protrudingthrough a suitable opening in the upper end of the carrier chamber, ahammer mounted for reciprocation in said carrier, and participating inall movements of the carrier, a hammer air inlet port passing throughthe normally closed lower end of the guide chamher, a carrier air inletor passage extending from end to end of the wall of the guide chamber,and opening at its inner end within the carrier chamber, a valve seatformed in the lower or outer end of the guide chamber and intersectingsaid inlet passages, an exhaust air passage leading from said seat tothe atmosphere, a valve plug mounted in said seat provided with threeindependent ports extending in different directions throughit, one ofwhich ports in one position of the valve plug is in registry with thecarrier air inlet, another of which ports in another position of thevalve plug is in registry with the hammer air inlet, and another ofwhich ports in another position of the valve plug connects the innerbranch of the carrier air inlet with the exhaust air passage,substantially as set forth.

11. In a riveting machine, in combination, amain casing embodying acarrier chamber, a hammer carrier mounted free for reciprocation in saidchamber, said hammer carrier bearing a piston-head relationship to thesaid carrier chamber, a hammer mounted free for reciprocation in saidhammer carrier but carried by the carrier in all movements of thelatter, means for introducing a volume of air between the lower end ofthe carrier chamber and the adjacent end of the hammer carrier to causethe travel of said carrier, and means for introducing an independentvolume of air within the hammer carrier for the propulsion of thehammer, substantially as set forth.

In testimony that we claim the foregoing as our invention we havehereunto signed our names this 24Eth day of October, A. D. 1899.

J OS. J. TYN AN. HENRY O. MOSTILLER. In presence of F. NORMAN DIXON,THOS. K. LANCASTER.

